Need bolts for exhaust manifold heat shields on 1987 350TBI

So I own a 1987 V10 with a 350TBI. One thing that it’s missing are the spark plug heat shields though it does still have the heat shield that’s attached to the manifold for the stovepipe to the aircleaner. It’s missing the other 3 heat shields. This doesn’t use the later TBI heat shields where they use the exhaust manifold bolts, but instead they’re a 2 piece design where a bracket bolts to the block and the heat shield is attached to the bracket. I’m including a pic of what I have. My problem is the heat shields didnt come with the bolts. I think they’re M7 with captured washers but not absolutely sure and don’t know the length and I’m having a really hard time finding anything online that’ll fit. Anyway, does anyone on here know the exact specs of these bolts, where to get them, or maybe even have 3 of these I can buy off you? Let me know and thanks in advance!

I kind of remember them being 1/4" bolts. Coarse thread.

Have used original front cover bolts to attach these.